Professor Harold Borns stands on the edge of what was an ancient seashore in a blueberry barren in Columbia along Pineo Ridge. The location along with dozens of others is just one stop on the Maine Ice Age Trail.

The boulder is just one of many glacial artifacts that can be seen along the Maine Ice Age Trail.

Two separate moraines, one in the foreground and one in the background, can be seen in this blueberry barren in Cherryfield. Moraines are one of many glacial features to be found along the Maine Ice Age trail as founded by University of Maine professor Harold Borns.

Large rocks that have tumbled from the gravel in a pit off the Ridge Road in Cherryfield are part of just one of many moraines in the area. This gravel pit shows a cross section of a moraine.

A broad glacial delta is seen in the blueberry barrens of Columbia. A glacial delta consist of a broad flat landscape made of mostly gravel which was formed in the marginal area where the ice meet the Atlantic Ocean.

A large boulder along with a field of smaller ones sits along a Big Rock Ridge moraine, an irregular mass of unstratified glacial drift.

Moraines are one of many glacial features to be found along the Maine Ice Age trail.

Borns offers instruction on how gravel pits where made by glaciers some 15,000 years ago while referring to his Maine Ice Age trail map while in a pit off the Ridge Road in Cherryfield.